Fabrication of high-stability Ni-PSF@PAO40 microcapsules and their lubricating properties in polyamide 6

Abstract Novel Ni-PSF@PAO40 microcapsules (NPPMS) with high stability were prepared by using a combined processing method of electroless nickel plating and solvent volatilization. The results indicate that Ni is completely assembled on the surfaces PSF/PAO40 encapsulation capacity NPPMS achieved at 50%. Organic solvents immersion shows have an excellent chemical stability. Macro thermal tests reveal softening temperature increased up to over 400 °C while it becomes lower than 200 for microcapsules. Furthermore, embedded into polyamide 6 (PA6) prepare PA6/NPPMS composites. cross-sectional morphology are intact in PA6 matrices. microhardness effectively improved incorporation NPPMS. As compared neat PA6, coefficient friction (COF) composites 10% could be reduced 87.7% (from 0.49 0.06) wear rate decreased 96.8% 1.29×10 ?5 4.15×10 ?7 mm 3 /(N·m)). Further studies confirmed increasing test loads temperatures was beneficial improve lubrication performance despite opposite trend occurred when sliding speeds. It has been demonstrated synergistic effects between PAO40 layer play important role improving tribological properties PA6. Therefore, significantly ability resist harsh environment, which scientific significance expanding use more practically self-lubricating